Viscoplastic response of beryllium under shock compression

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:6304071

Asay, J R; Chhabildas, L C; Wise, J L

In the present work, plane shock wave techniques were used to determine the effective viscosity of beryllium over a strain-rate regime of about 1 to 60 ..mu..s/sup -1/. Viscosity coefficients were derived from risetime measurements on steady shock waves produced by initial compression of specimens from the ambient state, and also from measured risetimes of reloading waves produced by recompression from the initial shocked state. These results indicate that the effective viscosity appropriate to initial shock loading decreases from about 190 Pa-s (1900 poise) at a strain rate of 1 ..mu..s/sup -/exclamation to about 40 Pa-s at a strain rate of about 60 ..mu..s/sup -1/. Results obtained from recompression experiments indicate an increase in viscosity over that obtained for initial compression.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6304071
• Report Number(s): SAND-81-0379C; CONF-810827-8; ON: DE81028248
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALKALINE EARTH METALS
BERYLLIUM
ELEMENTS
IMPACT SHOCK
MECHANICAL PROPERTIES
METALS
PLASTICITY
STRAINS